US9215576B2 - Communication system, femto base station, call session control server, home subscriber server, communication method, and program - Google Patents

Communication system, femto base station, call session control server, home subscriber server, communication method, and program Download PDF

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US9215576B2
US9215576B2 US13/133,106 US200913133106A US9215576B2 US 9215576 B2 US9215576 B2 US 9215576B2 US 200913133106 A US200913133106 A US 200913133106A US 9215576 B2 US9215576 B2 US 9215576B2
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base station
location information
femto base
communication
call
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US20110269420A1 (en
Inventor
Osamu Kurokawa
Kazuki Eguchi
Naoki Yoshida
Shunsuke Yokouchi
Yasuhiro Watanabe
Hiroaki Akiyama
Takuo Akimoto
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NEC Corp
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NEC Corp
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    • H04W4/22—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/50—Connection management for emergency connections
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/029—Location-based management or tracking services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/90—Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
    • H04W76/007—
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S2205/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S2205/01—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations specially adapted for specific applications
    • G01S2205/06—Emergency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B

Definitions

  • the present invention relates to a communication system, a femto base station, a call session control server, a home subscriber server, a communication method, and a program for a femto cell to connect an incoming call from a wireless terminal, including a call to an emergency organization communication apparatus.
  • a public mobile communication network for connecting an incoming call from a wireless terminal (UE; user equipment) to another terminal or device.
  • UE wireless terminal
  • so-called phone number conversion is performed during a call for an emergency organization, etc., for converting the phone number of an emergency call, such as a police telephone number 110 or a fire department telephone number 119 , into a phone number of emergency organization allocated in advance in accordance with current location information of a wireless terminal which is a caller.
  • a 3G (third generation: third generation mobile communication) network will be described as an example of an existing public mobile communication network for connecting UE, such as a cell phone, to another terminal or device.
  • a system based on an existing 3G network is connected to HLR (Home Location Register) 10 used in an IMS (IP Multimedia subsystem) network, emergency organization server (ERS; Emergency Register Server) 11 for notifying location information to emergency organization communication apparatus (described as emergency organization apparatus in FIG. 1 ) 14 , and GMSC (Gateway Mobile Switching Center) 12 as a gateway for connecting the system based on the existing 3G network to fixed network (PSTN; Public Switched Telephone Network) 13 as an example of a public communication network.
  • PSTN Public Switched Telephone Network
  • the system based on the existing 3G network houses UE 1 to be connected for communication and connects UE 1 to one from among HLR 10 , ERS 11 , and GMSC 12 described above.
  • the system based on the existing 3G network includes UTRAN (UMTS Terrestrial Radio Access Network) 93 by Node-B 91 and RNC 92 and MSC (Mobile Switching Center) 94 comprising VLR 95 .
  • UTRAN UMTS Terrestrial Radio Access Network
  • RNC Mobile Switching Center
  • UE, Node-B, RNC, MSC, VLR, HLR, and GMSC in the existing 3G network are apparatuses that execute processes compliant with 3GPP (3rd Generation Partnership Project), and the description of specific functions and processing operations will be omitted.
  • 3GPP 3rd Generation Partnership Project
  • RAN Radio Access Network
  • SAI Service Area Identification
  • MSC Radio Access Network Application Part
  • SAI first location information denotes values predetermined by a system operator and is defined in a format including parameters MCC (Mobile Country Code), MNC (Mobile Network Code), LAC (Location Area Code), and SAC (Service Area Code) as illustrated in FIG. 3 .
  • MSC 94 stores SAI in VLR 95 in association with base station identification information as information for identifying the base station connected with the caller and transmits SAI to HLR 10 by using a MAP (Mobile Application Part) message.
  • MAP Mobile Application Part
  • MSC 94 performs so-called phone number conversion for converting a predetermined phone number, such as an emergency telephone number 110 or 119 , into a phone number allocated in advance in accordance with current location information of caller UE 1 . If the phone number transmitted from UE 1 is included in target phone numbers for the phone number conversion, the phone number is converted into a called party's phone number by phone number conversion, and the call is connected to the converted called party's phone number.
  • a predetermined phone number such as an emergency telephone number 110 or 119
  • GEOarea Geographical Area
  • MSC 94 stores GEOarea in VLR 95 , and if the called party of UE 1 is an emergency organization communication apparatus, transmits GEOarea to ERS 11 along with a MAP message.
  • GEOarea will be referred to as second location information.
  • GEOarea (second location information) is defined in a format as illustrated in FIG. 4 and denotes location information including latitude/longitude information of a sender apparatus.
  • UE 1 first transfers a connection request (SETUP) to RAN 93 .
  • MSC 94 transmits CALLPROC as a reply to UE 1 and transmits an IAM message to GMSC 12 . In this way, call control is performed for emergency organization communication apparatus 14 through fixed network 13 .
  • MSC 94 transmits a location measurement request to UTRAN 93 by using a RANAP message to cause UE 1 to measure location information including latitude/longitude information.
  • Node-B 91 transmits GEOarea to MSC 94 .
  • MSC 94 transmits GEOarea to ERS 11 by using a MAP message.
  • ERS 11 transmits GEOarea received from MSC 94 to emergency organization communication apparatus 14 . This allows a call between UE 1 and emergency organization communication apparatus 14 .
  • MSC 94 When the end of the call (DISC; Disconnect) is received from UE 1 , MSC 94 notifies the end of the call to ERS 11 by using a MAP message.
  • ERS 11 inquires of HLR 10 for an acquisition location for acquiring location information of requested UE by using a MAP message.
  • ERS 11 identifies the acquisition location based on a reply to the inquiry and transmits, by using a MAP message, the location information request to MSC 94 identified as the acquisition location.
  • MSC 94 causes UE 1 to perform location measurement by using a RANAP message.
  • the system based on the existing 3G network causes UE 1 to measure the location information including the latitude/longitude information, and when MSC 94 receives GEOarea transmitted from Node-B 91 , transmits, by using a MAP message, GEOarea received by MSC 94 to emergency organization communication apparatus 14 through ERS 11 .
  • a radio network controller acquires specific information that is information specific to a wireless transmit/receive unit (WTRU) and transfers the specific information to a Node, such as a wireless base station, to allow the Node that has received the information to use the specific information.
  • WTRU wireless transmit/receive unit
  • Patent Document 1 An example is disclosed in National Publication of International Patent Application No. 2007-511185 (hereinafter, called Patent Document 1).
  • a femto base station that covers a narrow communication area of about several dozen meters in radius wirelessly connects to UE to connect UE to a mobile communication core network
  • the femto cell mainly covers an indoor communication area such as in a house or office. This allows covering the communication area without spending much money on the infrastructure development of an existing macro cell base station.
  • Patent Document 1 a configuration in which a femto cell is installed is not taken into consideration.
  • An object of the present invention is to provide a communication system, a femto base station, a call session control server, a home subscriber server, a communication method, and a communication program for using a femto base station to handle a call to an emergency organization communication apparatus.
  • a femto base station is a femto base station arranged in a communication system connected to a public communication network including an emergency organization communication apparatus, the femto base station comprising: a storage that stores first location information which is information for identifying a location of the femto base station or for identifying a location of an assembly of a plurality of base stations including the femto base station; and a communication controller that attaches the first location information to a SIP message in order to notify the first location information to the emergency organization communication apparatus when there is a call from the wireless terminal, and that transmits the SIP message to another apparatus.
  • first location information which is information for identifying a location of the femto base station or for identifying a location of an assembly of a plurality of base stations including the femto base station
  • a communication controller that attaches the first location information to a SIP message in order to notify the first location information to the emergency organization communication apparatus when there is a call from the wireless terminal
  • a call session control server is a call session control server arranged in a communication system connected to a public communication network including an emergency organization communication apparatus, the call session control server comprising: a conversion table associating a predetermined phone number with a predetermined called party's phone number in accordance with first location information which is information for identifying a location of a femto base station arranged in the communication system, the femto base station wirelessly communicating with a wireless terminal, or for identifying a location of an assembly of a plurality of base stations including the femto base station; and a communication controller that receives a SIP INVITE message including the first location information from the femto base station, converts a phone number included in the SIP INVITE message into the called party's phone number based on the conversion table if the phone number is included in the conversion table, and transmits the converted called party's phone number to a media gateway control server arranged in the communication system by using a SIP I
  • a home subscriber server is a home subscriber server arranged in a communication system connected to a public communication network including an emergency organization communication apparatus, the home subscriber server comprising: a visitor location register that stores second location information, which is information including longitude/latitude information of a wireless terminal, in association with base station identification information, which is information for identifying a femto base station connected to the wireless terminal; and a communication controller that stores the second location information, which is received during authentication of the wireless terminal from the femto base station connected to the wireless terminal, in the visitor location register in association with the base station identification information.
  • a communication method is a communication method in a communication system that is connected to a public communication network including an emergency organization communication apparatus and that includes a femto base station, the communication method comprising: the femto base station attaching first location information, which is information for identifying a location of the femto base station or for identifying a location of an assembly of a plurality of base stations including the femto base station, to a SIP message in order to notify the first location information to the emergency organization communication apparatus when there is a call from the wireless terminal; and the femto base station transmitting the SIP message to another apparatus.
  • first location information which is information for identifying a location of the femto base station or for identifying a location of an assembly of a plurality of base stations including the femto base station
  • a recording medium is a computer-readable recording medium storing a program causing a computer of a femto base station arranged in a communication system connected to a public communication network including an emergency organization communication apparatus to execute, the recording medium storing a program causing the computer to execute a first communication control process of attaching first location information, which is information for identifying a location of a femto base station or for identifying a location of an assembly of a plurality of base stations including the femto base station, to a SIP message in order to notify the first location information to the emergency organization communication apparatus when there is a call from the wireless terminal, and of transmitting the SIP message to another apparatus.
  • first location information which is information for identifying a location of a femto base station or for identifying a location of an assembly of a plurality of base stations including the femto base station
  • FIG. 1 is a block diagram showing a system configuration example based on an existing 3G network.
  • FIG. 2 is a diagram showing a flow of location information transmission in the existing 3G network.
  • FIG. 3 is a diagram showing a format example of SAI.
  • FIG. 4 is a diagram showing a format example of GEOarea.
  • FIG. 5 is a sequence diagram showing a communication operation in the existing 3G network.
  • FIG. 6 is a block diagram showing a configuration example of a communication system as an exemplary embodiment.
  • FIG. 7A is a block diagram showing a configuration example of a femto base station of the present exemplary embodiment.
  • FIG. 7B is a block diagram showing a configuration example of a call session control server of the present exemplary embodiment.
  • FIG. 7C is a block diagram showing a configuration example of a home subscriber server of the present exemplary embodiment.
  • FIG. 8 is a diagram showing a flow of location information transmission in a communication system as an exemplary embodiment.
  • FIG. 9 is a sequence diagram showing a communication operation in a communication system as an exemplary embodiment.
  • the present exemplary embodiment illustrates a preferred example, in which a femto base station (Femto AP; Femto Access Point) performs an operation for connecting a call to UE which is a wireless terminal, and location information is used within a range defined in a specification such as 3GPP to allow making a call to an emergency organization.
  • a femto base station Femto AP; Femto Access Point
  • communication system 1 of the present exemplary embodiment is connected to HLR 10 , ERS 11 , and GMSC 12 .
  • Communication system 1 of the present exemplary embodiment includes Femto AP 2 that constructs a predetermined communication area, Femto AP-OSS (Operation Support System) 3 , PDG (Packet Data Gateway) 4 that connects to each Femto AP 2 through a network, AAA (Authentication Authorisation Accounting) 5 , call session control server (CSCF; Call Session Control Function) 6 , home subscriber server (HSS) 7 , and media gateway control server (MGCF; Media Gateway Control Function) 9 .
  • CSCF Call Session Control Function
  • HSS home subscriber server
  • MGCF Media Gateway Control Function
  • FIG. 7A is a block diagram showing a configuration example of Femto AP of the present exemplary embodiment.
  • Femto AP 2 (described as Femto APs 2 a and 2 b in FIG. 6 ) is a small wireless base station that covers a narrow communication area of about several dozen meters in radius. As shown in FIG. 7A , Femto AP 2 includes communication controller 21 and storage 22 . Storage 21 stores SAI. When receiving a connection request from UE 1 , communication controller 21 attaches SAI to a SIP message, SAI indicating the location of a base station of Femto AP 2 or the location of an assembly of a plurality of base stations including the base station of Femto AP 2 , and transmits SAI to another apparatus.
  • the SIP message is, for example, INVITE.
  • the apparatus that receives the SIP message is, for example, CSCF 6 .
  • Femto AP-OSS 3 is an apparatus for setting or monitoring Femto AP 2 through a network.
  • PDG 4 is an apparatus that relays a message.
  • AAA 5 is an apparatus that executes an authentication process, etc., of UE 1 .
  • FIG. 7B is a block diagram showing a configuration example of CSCF of the present exemplary embodiment.
  • CSCF 6 includes communication controller 61 and storage 62 .
  • Storage 62 stores a conversion table.
  • the conversion table is a table in which a predetermined phone number, such as an emergency telephone number 110 or 119 , is registered in association with a phone number allocated in advance in accordance with location information based on SAI, to perform above-described phone number conversion.
  • Communication controller 61 includes functions of session control, management, authentication, routing, etc., using SIP (Session Initiation Protocol).
  • communication controller 61 determines whether the phone number included in the SIP INVITE message is included in the conversion table. If the phone number is included in the conversion table, communication controller 61 converts the phone number into a called party's phone number based on the conversion table and transmits the converted called party's phone number to MGCF 9 by using a SIP INVITE message.
  • communication controller 61 After receiving the SIP INVITE message including SAI from Femto AP 2 , if the phone number included in the SIP INVITE message is included in a number group predetermined in the conversion table, communication controller 61 transmits, to HSS 7 and by using a DIAMETER message, a location information transfer request for HSS 7 to transfer GEOarea to ERS 11 .
  • communication controller 61 transfers a call end notification to HSS 7 by using a DIAMETER message.
  • FIG. 7C is a block diagram showing a configuration example of HSS of the present exemplary embodiment.
  • HSS 7 includes communication controller 71 and VLR (Visitor Location Register) 8 and manages subscriber information of UE 1 .
  • Communication controller 71 acquires the subscriber information of UE 1 from HLR 10 and stores and manages the acquired subscriber information of UE 1 in VLR 8 .
  • HSS 7 has a MAP GW (MAP Gateway) function.
  • communication controller 71 associates GEOarea, which includes the longitude/latitude information of UE 1 received from Femto AP 2 connected to UE 1 , with base station identification information, which is information for identifying Femto AP 2 , and stores GEOarea in VLR 8 .
  • communication controller 71 After receiving a call end notification from CSCF 6 , if a location information request is received from ERS 11 within a predetermined time, communication controller 71 transmits GEOarea stored in VLR 8 to ERS 11 .
  • MGCF 9 includes a function for interconnecting the communication system as the present exemplary embodiment with an existing telephone network and provides a function for controlling MGW (media gateway) not shown, etc.
  • Femto AP-OSS 3 sets and registers SAI (first location information) and GEOarea (second location information) in Femto AP 2 and stores SAI and GEOarea in storage 22 .
  • SAI first location information
  • GEOarea second location information
  • a LAC value in SAI may be determined from, for example, the installed location of Femto AP 2 .
  • a SAC value may be uniquely provided for each Femto AP, for example.
  • GEOarea is determined by the installed location of Femto AP 2 .
  • Femto AP 2 When there is a call from UE 1 , Femto AP 2 transmits GEOarea to CSCF 6 during the authentication request (Registration) of SIP and transmits SAI to CSCF 6 by using a SIP INVITE message.
  • SAI in a predetermined area in the header of the SIP message and store GEOarea in a predetermined area in the body of the SIP message.
  • CSCF 6 uses the conversion table to perform the phone number conversion to the counterpart number, converts the counterpart number from UE 1 to a called party's phone number, and connects a call to the converted called party's phone number.
  • HSS 7 associates GEOarea received from UE 1 during Registration of SIP with the base station identification information for identifying Femto AP 2 connected to the caller and stores GEOarea in VLR 8 .
  • HSS 7 further uses a MAP message to transmit SAI to HLR 10 by a MAP GW function.
  • HSS 7 transmits GEOarea to ERS 11 and causes ERS 11 to transmit GEOarea to emergency organization communication apparatus 14 .
  • Femto AP 2 issues an authentication request (Registration) to HSS 7 and transmits preset GEOarea to HSS 7 by using a message of Registration.
  • HSS 7 associates GEOarea with the base station identification information for identifying Femto AP 2 of the sender and stores GEOarea in VLR 8 .
  • Femto AP 2 transmits CALLPROC to UE 1 as a reply and attaches SAI to a SIP INVITE message to transmit SAT to CSCF 6 .
  • SAI be attached to a predetermined area in the header of a SIP INVITE message.
  • CSCF 6 checks whether the phone number included in the INVITE message is included in the number group of the conversion table as a target of the phone number conversion. If the received phone number is included in the conversion table, CSCF 6 uses the conversion table to convert the phone number into the called party's phone number in accordance with SAI and transmits the SIP INVITE message including information of the called party's phone number to MGCF 9 .
  • MGCF 9 transmits an IAM message as in the case of the existing 3G network to GMSC 12 and performs call control of emergency organization communication apparatus 14 , having the converted called party's phone number, through fixed network 13 .
  • CSCF 6 After transmitting the SIP INVITE message to MGCF 9 , CSCF 6 transmits a transfer request of location information to HSS 7 by using a DIAMETER message.
  • HSS 7 When receiving the transfer request of location information from CSCF 6 , HSS 7 transmits GEOarea to ERS 11 by using a MAP message as in the case of the existing 3G network and causes ERS 11 to transmit GEOarea to emergency organization communication apparatus 14 . In this way, a call between UE 1 and emergency organization communication apparatus 14 starts.
  • Femto AP 2 When the end of the call (DISC) is transmitted from UE 1 to Femto AP 2 , Femto AP 2 transmits a SIP BYE message to CSCF 6 . CSCF 6 transmits the end of the call to HSS 7 by using a DIAMETER message. When receiving the notification of the end of the call, HSS 7 transmits the call end notification to ERS 11 by using a MAP message as in the case of the existing 3G network.
  • CSCF 6 When receiving the notification of the end of the call, HSS 7 transmits the call end notification to ERS 11 by using a MAP message as in the case of the existing 3G network.
  • ERS 11 inquires of HLR 10 for an acquisition location for acquiring location information of UE as a request target of location information by using a MAP message.
  • ERS 11 transmits, by using a MAP message, a location information request to HSS 7 that is identified based on a reply to the inquiry.
  • HSS 7 When receiving the location information request, HSS 7 transmits GEOarea of relevant Femto AP 2 stored in VLR 8 to ERS 11 by using a MAP message and causes ERS 11 to transmit GEOarea to emergency organization communication apparatus 14 .
  • the controls are predetermined by specifications such as 3GPP and are not directly related to the characteristics of the present invention. Therefore the description will be omitted.
  • At least SAI or GEOarea is embedded in a predetermined area of a SIP message, and a femto cell is used within a range defined by a 3GPP standard to realize a communication system corresponding to a call for an emergency organization communication apparatus based on location information as in an existing 3G network.
  • the communication system using the femto cell can be installed without modifications to the existing 3G network.
  • HSS 7 transfers GEOarea of relevant Femto AP 2 stored in VLR 8 . Therefore, the location does not have to be measured again, and unnecessary processes can be reduced.
  • the exemplary embodiment is a preferred exemplary embodiment of the present invention.
  • the present invention is not limited to the exemplary embodiment, but can be implemented with various changes based on the technical concept of the present invention.
  • system in the present specification denotes a logical assembly of a plurality of apparatuses (or functional modules that realize specific functions), and whether the apparatuses and functional modules are in a single casing does not particularly matter.
  • CSCF and MGCF realize predetermined functions, and whether the configurations realizing the functions are in a single casing does not particularly matter.
  • programs of processing procedures for realizing the femto base station, the call session control server, and the home subscriber server in the exemplary embodiment can be recorded in a recording medium, and the functions of the exemplary embodiment can be realized by causing a CPU (Central Processing Unit) of a computer included in the system to execute the processes based on the programs supplied from the recording medium.
  • the CPU is arranged in, for example, a communication controller in each of the femto base station, the call session control server, and the home subscriber server.
  • the present invention is also applied when the recording medium or an external recording medium through a network supplies an information group including the programs to an output apparatus.
  • program codes read out from the recording medium realize new functions of the present invention
  • the recording medium storing the program codes and signals read out from the recording medium constitute the present invention.
  • Examples of the recording medium include a flexible disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-R, a CD-RW, a DVD-ROM, a DVD-RAM, a DVD-RW, a DVD+RW, a magnetic tape, a non-volatile memory card, and ROM.
  • the functions of the exemplary embodiment can be realized in the femto base station, the call session control server, and the home subscriber server that is controlled by the programs.
  • the femto base station can be used to make a call for an emergency organization communication apparatus based on the location information as in the existing public mobile communication network.

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